Printing-machine



D. J. SCOTT AND C. E. DRANGE.

PRINTING MACHINE. APPLICATION FILED SEPT. 29, 1914.

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PRINTING MACHINE.

APPLICATION FILED SEPT. 29. I914.

Patented May 11, 1920.

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0. I. SCOTT AND 0. E. DRANGE.

PRINTING MACHINE.

APPLICATION FILED SEPT. 29. I914.

Patented May 11,1920.

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A TTORNEY o. J. SCOTT ANDYCLE. DRANGE.

PRINTING MACHINE.

APPLICATION FILED SEPT. 29, 1914.

Patented May 11, 1920.

4 SHEETS-SHEET 4.

N INVENTORS,

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. v BVWZEDWL? ATTORNEY UNITED STATES PATENT oFFIoE.

DAVID JOHN SCOTT AND CARL EBERHARD DRANGE, OF PLAINFIEL'D, NEW JERSEY,

ASSIGNORS TO ISABELLA-SCOTT AND DAVID J. SCOTT, EXECUTORS 0F WALTERSCOTT, DECEASED, LATE 0F PLAINFIELD, NEW JERSEY.

PRINTING-MACHINE.

To all whom it may concern.-

Be it known that We, DAVID JOHN Soo'r'r and CARL E. DRANGE, bothcitizens of the United States, and residents of Plainfield, inthe'county of Union and State of New Jersey, have invented certain newand useful Improvements in Printing-Machines, of which the following isa specification.

The present invention relates to printing machines in which at least oneof the printing members partakes of a reciprocating movement either in arectilinear path or in a curvilinear path, this type being wellexemplified by tae ordinary two revolution flat bed machine now socommonly used. The main object of this invention is to produce animproved fiat bed printing machine which is capable of attaining ahigher running speed, which is of a more rigid and eflicientconstruction, and capable of producing a better impression.

The invention consists of the hereinafter described features ofconstruction, combination of parts and arrangement of elements, as setforth in the claims, a preferred embodiment of which is disclosed in theaccompanying description and drawings, in which drawings: 7

Figure 1 is a side elevation of a flat bed press embodying theinvention, the general framework of the press being indicated indiagrammatic outline.

Fig. 2 is a detail view of the impression bridge and a member passingthrough the same.

Fig. 3 is a plan view partly in section, showing the bed propellingmeans, and it may be considered as a section taken on the line 3-3 ofFig. 1 with the bed removed and showing the framework, the tracks onwhich the bed runs, and other general elements of the machinediagrammatically.

l-to 9 inclusive are diagrammatic views showing the various positions assumed by the reversing elements during one complete reciprocation of thebed.

Fig. 10 is a diagrammatic view showing the means for reversing thethrust of the reciprocating bed.

Similar characters of reference indicate corresponding parts in theseveral views.

1 is the impression cylinder mounted in the main frame 2 and driven bythe gear 3. The impression cylinder 1 cooperates with Specification ofLetters Patent.

Application filed September 29, 1914.

Patented May 11, 1920.

Serial No. 864,119.

the form 1 carried on the type bed 5, and this cylinder is raised andlowered by one of the well-known methods used in such ma chines, thelower position being occupied during a printing stroke while the upperposition is taken during the return stroke of the bed 5. 6 is the maindriving shaft extending from a point outside the framing to a pointunderneath the bed, as shown. On its outer end this shaft 6 carries agear 7 which meshes directly with the large cylinder gear 3. 14. is areversing shaft or crank shaft also extending from a point outside theframing to a point underneath the bed, as shown, on the end of which isa gear 15 which meshes directly with the gear 7 on the bed drivingshaft.

In the form here disclosed the gear 3 makes two revolutions toeachimpression, the gear 7 makes six revolutions to each impression, andthe gear 15 makes three revolu'tionsto each impression. Locatedunderneaththe impression member 1 is the impression bridge 32 providedwith an opening 10'. On the inner. end of the bed driving shaft 6 is themain stroke gear 8 with'whieh meshes the double-width return stroke gear10. These two gears are moved sidewise in a well-known mannerperiodically by means of the yoke 13 actuated by the cam 41. The cam 41is mounted on'the shaft 410 which makes one revolution to eachimpression, being driven by means of the gear 411 from pinion 112 onshaft 6. The main stroke gear 8 is continuously in mesh with one of thegears 10 and in addition to this is adapted to engage with the mainstroke rack 9 suitably mounted on the bed, the portion of the gear 10which is not in mesh with the gear 8 being adapted to engage with themain return stroke rack 12 also mounted on the bed. The gear 10 ismounted on a stud 11 as shown. The parts are so arranged that when thegear 8 is in the plane of the rack 9, the gear 10 is out of the plane ofthe rack 12, and vice versa.

The reversing shaft 14 carries at its inner end double crank arms 16 and17 connected by a crank pin 18, the structure being preferably integralor in one piece. Connected to the crank pin 18 are two connecting rods22 and 23' which in turn connect" with the crossheads or reversingmembers here shown as rectilinearly moving reciprocating racks 24 and25. These racks slide in the guideways 26 and 27 and the rack 25 furtherpasses through the opening 40 in the impression bridge 32. Mounted onfixed cen ters of rotation, shown here as studs on the framework, arethe reversing gears or pin ions 28 and 29. These pinions are oscillatedby the racks 24 and 25 and intermittently engage and disengage with thereversing racks 30 and 31 carried by the bed.

The bed preferably runs on an odd number of tracks, in the presentinstance five,

the center track being marked 35, the two outside tracks 33 and 34, andthe two in termediate tracks 36 and 37. It will be noted that inaccordance with the preferred embodiment the main bed racks, that is themain stroke rack 9 and the return stroke rack 12, are located on the bedat a point intermediate the central track and the next adjacent track37, while the reversing racks 30 and 31 are located on the other side ofthe central track 35 and between it and the next adjacent track 36. Toproperly cooperate with these parts the. crank 18 and the reciprocatingreversing members and other connections are located in the plane of thereversing racks 30 and 31 on one side of the center track 35, while themain and return stroke gears 8 and 10 are located on the other side ofthe center track 35 and in the plane of the main racks 9 and 12. Allfour racks face downward whereby is avoided the necessity of having theusual heavy rack hanger employed when oppositely facing racks are used.The two reversing racks 30 and 31 are located one in advance of theother and offset laterally as shown. The reversing shaft 14 has threebearings, one 19 in the main frame, another 20 under the center trackand a third 21 under the next adjacent track on the far side from thepoint where the bearing 19 is located. In this way the crank issupported at both ends very rigidly, giving much greater strength thanthe single support usually employed. The bed driving shaft 6 is providedwith a bearing 42 in the framework and with a bearing 43 under thecenter track. The stud 11 for carrying the return stroke gear is mountedin two bearings 45 I one under the central track and the other under thenext adjacent track on the near side to the point where the bearing 19is located. It will be noted that there is a direct drive from the beddriving shaft 6 to the impression member, to the reversing shaft, and tothe bed so. that very little lost motion takes place. From this it willbe seen that the driving shaft 6 has a gear at its outer end whichmeshes directly with the gear 011 the impression cylinder, and a gear atits other end which meshes directly with the bed. This is the leastpossible number of gears and insures perfect register during printing.Also, during reversal, the gear on the inner end of the.

shaft 6 drives the bed, while the gear on the outer end of the shaftdrives the crank shaft 14, thus insuring perfect timing be:

tween the bed and the reversing means with the weight and thickness ofthe bed can be reduced, enabling a very low machine to be built and atthe same time decreasing the weight of the bed, which of course is animportant factor. It will further be noted that the shafts 6, l1 and 14are located at a point below the top of the bridge and that thereversing member 25 passes through the opening 40 in the bridge 32 so asto reach to the other side and engage the reversing pinion 29. It willbe noted that the distance of the crank 18 from the bridge 32 and thelength of the connecting rod 23 extending from said crank to thereversing member 25 passing through the bridge 32 is such that theconnecting rod 23 is at all times on the same side of the bridge 32 asthe crank 18, and consequently the angular elevation or movement of theconnecting rod is always on the same side of the bridge. By having allthe racks on the bed facing downward the usual heavy rack hanger is nolonger needed and the thrust is imparted to the bed ina more directmanner. Furthermore by having separate connections for reversing the bedat each end each connection 22 or 23 can be.

adjusted individually, which is of importance since if the bed reversesperfectly at one end and imperfectly at the otheriend the reversal atone end can be adjusted without interfering with the reversal at theother end. Also by locating the reversing means on one side of thecentral track 35 and the main' driving elements on the other side of themain track 35, power is applied to move the bed at what is found to bethe most effective point since the nearer the center power is appliedthe easier the bed can be moved. The bed is driven on its uniformprinting stroke by the gear 8 meshing with the main rack 9 while on thereturn stroke the gear 10 engages with the return rack 12 in awell-known manner. At the end of the uniform printing stroke theprinting stroke gear 8 runs .out of the.

right-hand end of the printing stroke driving rack 9 at the moment thatthe reversing rack 31 meshes with the reversing pinion 29 (see Fig.4),at which time the reversing crank 16-17 stands in a verticalpositiondirectly above the reversing shaft 14. During the continuedrotation of the reversing crank shaft 1 1 in the direction indicated,the bed 5 by means of the connectingrod 28, reversing rack 25 andreversing pinion 29 is gradually reduced in speed until the reversingcrank 16-17 stands at the righthand dead center, at which time the bedis at a standstill (see Fig. 5) The continued rotation of the crankshaft 14 reverses the direction of travel of the bed and accelerates itgradually until the moment when the crank 16-17 is standing verticallydirectly below crank shaft 14: when the bed 5 is traveling at the fullsurface speed of the return stroke driving gear 10. (See Fig. 6). Atthis moment the reversing rack 81 runs out of mesh with the reversingpinion 29 and at the same time the return stroke driving gear 10 mesheswith return stroke driving rack 12 after which the bed travels at auniform speed on its return stroke until the return stroke driving gear10 has reached the left-hand end of the return stroke driving rack 12.At this moment the reversing rack 30 is just starting in to mesh withthe reversing pinion 28 and the reversing crank 1617 is standingvertically with the crank pin directly below the crank shaft 1 1 (seeFig. '7). \Vhen in this position the continued rotation of the crankshaft 1 1 through the connecting rod 22, reversing rack 2a and reversingpinion 28 gradually reduces the speed of the bed 5 until the crank pin18 is at the left-hand dead center (see Fig. 8), at which time the bed 5has come to a standstill at the extreme right-hand end of the machine.The continued rotation of the crank reverses the direction of movementof the bed and gradually accelerates it until full printing speed isreached, at which time the crank 1617 stands vertically above thereversing crank shaft 14- and the reversing pinion 28 is running out ofmesh with the reversing rack 30 while at the same time the printingstroke driving gear 8 is starting to mesh with the printing -strokedriving rack 9. (See Fig. 9).

The reversing members or racks 24- and 25 may be considered ascrossheads moved by the crank 16---17 on the crank shaft l l. In aconstruction of this kind the crosshead moves a distance equal to twicethe radius of the crank, while the crank is moving through an arc of180, that is from one point .in line with the radially moving crossheadon one side of the center of rotation of the crank to the opposite pointon the other side of the center of rotation. During the first 90,however, the crosshead moves a greater distance than the radius of thecrank, while during" the latter 90 the crosshead moves a lesser distancethan the radius of the crank. e have found that the movement of thecrosshead during the latter or lagging portion of the rotation of thecrank departs but little from a uniform decelerating motion and thattherefore the reversal of the bed can be accomplished during this periodwithout subjecting the machine to any undue strain or jar such as isnoted in connection with the ordinary so-called harmonic crank reversein which the greater portion of the reversal of the bed is effectedduring a very small portion of the movement of the crank. The fulltheory of this lagging portion of the crank movement is explained in anapplication filed by us on July 10, 1914, Serial No. 850,101, and needtherefore not be re peated here except to state that obviously from thedisclosure made the reversal of the bed at each end of the stroke takesplace during the lagging portion of the revolution of the crank.

The object of interposing the reversing pinions 28 and. 29 in the trainof connections between the reciprocating bed and the crank shaft it canbest be understood by a consideration of Fig. 10 in which is disclosedin addition to the reversing elements previously described, the pistons47 which are carried on the bed and the open ended cylinders 48 whichare mounted on the framework. From a consideration of Fig. 10 it will beseen that the thrust of the bed 5 is transmitted through the air cushionformed by the cylinder 41-8 and piston 17 to the framing 2 of themachine, the said thrust being in the same direction as the movement ofthe bed. In order to counterbalance this thrust and to minimize thelurch which ordinarily takes place in machines of this character duringeach reversal, it will be noted that the reversing rack 31, forinstance, is engaged with the reversing pinion 29, and inasmuch as thisreversing pinion 29 is mounted on a fixed center of rotation so that itmerely oscillates without having any rolling motion imparted to it, ittransmits the thrust received from the rack 31 to the reversing member25, which latter in turn transmits the thrust through the connecting rod23 to the crank Y pin 18 but in a direction opposite to that of themovement of the bed. In this connection it will be noted that during thedeceleration of the bed the crank pin 18 is t 'aveling in a directionopposite to that of the bed 5.

It will be evident that by the foregoing construction the speed ofpresses of the flat bed type can be greatly increased because thedeceleration of the bed takes place at a decreasing ratio which departsbut little from a uniform deceleration and because the thrust of the bedduring reversal is trans mitted to the press in opposite directions itis counterbalanced so that no lurching takes place. Also the exceedinglysubstantial structure made possible by the high bridge, as well as thelightness of the reciprocating bed, the absence of heavy rack hangersand the direct and balanced application of power to the bed produces avery high degree of compactness and eiliciency and also admits of alow-down construction of bed.

W hat is claimed, is:

l. A printing machine comprising: an impression member, a flat bed formmem her, an impression bridge located under the impression member andhaving an opening therein, reciprocating reversing members movingindependently of the bed, one of said members passing through theopening in the bridge, a crank on one side of the bridge whose center ofrotation is below the top thereof, connecting rods between the crank andthe reciprocating reversing members, the distance of the crank from thebridge and the length of the connecting rod extending from said crank tothe reversing member passing through the bridge being such that theconnecting rod is at all times on the same side of the bridge as thecrank, and connecting means between the reciprocating reversing membersand the bed.

2. A printing machine comprising: an impression member, a flat bed formmember, an impression bridge located under the impression member andhaving an opening therein, reciprocating reversing members movingindependently of the bed, one of said members passing through theopening in the bridge, a crank on one side of the bridge whose center ofrotation is below the top thereof, connecting rods between the crank andthe reciprocating reversing members, the distance of the crank from thebridge and the length of the connecting rod extending from said crank tothe reversing member passing through the bridge being such that theangular elevation of the connecting rod takes place on that side of thebridge on which the crank is located, and connecting means between thereciprocating reversion members and the bed A printing machinecomprising: an impression member, a flat bed form member, an impressionbridge located under the impression member and having an openingtherein, reciprocating reversing members moving independently of thebed, one of said members passing through the opening in the bridge,means located on one side of the bridge and below the top thereof foractuating both reciprocating reversing members, connecting means betweenthe reciproeating reversing members and the bed, and a bed driving shaftlocated intermediate the bridge and the actuating means and adapted todrive said bed and said actuating means.

bridge whose center of rotation is below the top thereof, connectingrods between the crank and the reciprocating reversing members, thedistance of the crank from the bridge and the length of the connectingrod extending from said crank to the reversing member passing throughthe bridge being such that the connecting rod is at all times on thesame side of the bridge as the crank, and a bed driving shaft locatedintermedi ate the bridge and the crank and adapted to drive said bed andsaid actuating means.

5. A printing machine comprising: an im pression member, a flat bed formmember, an impression bridge located under the impression member andhaving an opening therein, reciprocating reversing members movingindependently of the bed, one of said members passing through theopening in the bridge, connecting means between the reciprocatingreversing members and the bed, a crank on one side of the bridge'whosecenter of rotation is below the top thereof,

connecting rods between the crank and the reciprocating reversingmembers, the distance of the crank from the bridge and the length of theconnecting rod extending from said crank to the reversing member passingthrough the bridge being such that the connecting rod is at all times onthe same side of the brid 'e as the crank a bed drivin D 7 shaft locatedintermediate the bridge and the crank, a gear on the bed driving shaftmaking sir; revolutions to each impression, a gear on the impressionmember making two revolutions to each impression and meshing with thegear on the bed driving shaft, and a gear rotating with the crank makingthree revolutions to each impression and also meshing with the gear onthe bed driving shaft.

6. A printing machine comprising: framing, an impression member, areciprocating bed, a bed driving shaft and a bed reversing shaft bothextending from a point outside the framing to a point underneath thebed, tracks underneath the bed on which the lat ter reciprocates, acrank on the inner end of the bed reversing shaft, a bearing in theframing, and two bearmgs underneaththe tracks on opposite sides of thecrank for the support of said reversing shaft and crank, bearings in theframing and underneath the tracks for supportlng thebed drlvmg shaft,andmeans for reciprocating and reversing the bed from the said drivingshaft and crank.

T. i printing machine comprising: framing, an impression member, areciprocating bed, a bed driving shaft and a bed reversing shaft bothextending from a point outside the framing to a point underneath thebed,

tracks underneath the bed on which the latter 'IQCIPIOCZLtQS, a crank onthe inner end of the bed reversing shaft, a bearing in the framing, twobearings underneath the tracks on opposite sides of the crank for thesupport of said reversing shaft and crank, bearings in the framing andunderneath the tracks for supporting the bed driving shaft, vmeans forreciprocating and reversing the bed from the said driving shaft andcrank, a gear on the outer end of the bed driving shaft, and a gear bothon the im pression member and on the reversing shaft meshing with thesaid gear on the bed driv ing shaft.

8. A printing machine comprising: framing. an impression member, areciprocating bed, a bed driving shaft and a bedreversing shaft bothextending from a point outside the framing to a point underneath thebed, an odd number of tracks underneath the bed on which the latterreciprocates, a crank on the inner end of the bed reversing shaft, threebearings for said reversing shaft, one in the framing,one underthecenter trackand one under the next adjacent track on the far side fromthe bearing on the framing whereby to support said crank on oppositesides, bearings in the framing and underneath the center tr ck forsupporting the bed driving shaft, and means for reciprocating andreversing the bed from the driving shaft and said crank.

9. A printing machine comprising: framing, an impresssion member, areciprocating bed, a bed driving shaft and a bed reversing shaft bothextending from a point outside the framing to 'a point underneath thebed, an odd number of tracks underneath the bed on which the latterreciprocates, a

crank on the inner end of the bed reversing shaft, three bearings forsaid shaft, one on the framing, one under the center track and one underthe next adjacent track on the far side from the bearing in the framingn-liereby to support said crank on opposite sides, bearings in theframing and underneath "the center track for supporting the bed drivingshaft, means for reciprocating and reversing the bed from the drivingshaft and said crank, a gear on the outer end of the bed driving shaft,and a gear both on the impression member and on. the bed reversing shaftmeshing with said gear on the bed driving shaft.

10. A printing machine comprising: framing, an impression member, areciprocating bed, a bed driving shaft and a bed underneath the bed,tracks underneath the bed on which the latter reciprocates, a crank onthe inner end of the bed reversing shaft, a bearing in the framing, andtwo bearings underneath the tracks on opposite sides of the crank forthe support thereof and of said reversing shaft, bearings in the framingand underneath the tracks for supporting the bed driving shaft, bearingsunderneath the tracks for supporting the return stroke shaft, and meansfor reciprocating and reversing the bedfrom said shafts.

11. A printing machine comprising: framing, an impression member, areciprocating bed, a bed driving shaft and a bed reversing shaft bothextending from a point outside the framing to a point underneath thebed, a main stroke gear on said bed driving shaft, a return stroke shaftdriven from said bed driving shaft located underneath the bed, tracksunderneath the bed *on which the latter reciprocates, a crank-on theinner end of the bed reversing shaft, a bearing in the framing and twobearings underneath the tracks on opposite sides of the crank for thesupport thereof and of said reversing shaft, hearings in the framing andunderneath the tracks for supporting the bed driving shaft, bearingsunderneath the tracks for supporting the return stroke shaft, means forreciprocating and reversing the bed from said shafts, a gear on'theouter end of the bed driving shaft, and a gear both on the impressionmember on the bed reversing shaft meshing with said gear on the beddriving shaft.

1 A printing machine comprising: framing, an impression member, areciprocating bed, a bed driving shaft and a bed reversing shaft bothextending from a point outside the framing to a point underneath thebed, a return stroke shaft driven from the bed driving shaft locatedunderneath said bed, an odd number of tracks underneath the bed on whichthe latter reciprocates, a crank on the inner end of the bed reversingshaft, three bearings for said shaft, one on the framing, one under thecenter track and one underthe next adjacent track on the far side fromthe bearing in the framing whereby to support said crank on oppositesides, bearings in the framing and underneath the center track forsupporting the bed driving shaft, bearings under the center track andunder the next adjacent track on the near side from the bearing in theframing for supporting the return stroke shaft, and means forreciprocating and reversing the bed from said.

shafts,

13. A printing machine comprising: framing, an impression member, areciproeating bed, a bed driving shaft and a bed reversing shaft bothextending from a point outside the framing to a point underneath thebed, a return stroke shaft driven from the bed driving shaft locatedunderneath said bed, an odd number of tracks underneath the bed on whichthe latter reciprocates, a crank on the inner end of the bed reversingshaft, three bearings for said shaft, one on the framing, one under thecenter track and one under the next adjacent track on the far side fromthe bearing in the framing whereby to support said crank on oppositesides, hearings in the framing and underneath the center track forsupporting the bed driving shaft, bearings under the center track andunder the next adjacent track on the near side from the bearing in theframing for supporting the return stroke shaft, means for reciprocatingand reversing the bed from said shafts, a gear on the outer end of thebed driving shaft, and a gear both on the impression member and on thebed reversing shaft, meshing with said gear on the bed driving shaft.

14. A bed motion for printing machines comprisin a reciprocating bed, anodd number of tracks on which the bed reciprocates, a reversing crank011 one side of the center track, main and returnstroke gears .on theother side of the center track, means for driving said gears foreffecting reciprocatlon of the bed, and means for driving said crank toeffect reversal of the bed, and

means for driving said last-named means,

said means being driven from said gear driving means.

15. A bed motion for printing machines comprising: a reciprocating bed,an odd number of tracks on which the bed. reciprocates, two down facingmain racks on the bed on one side of the center track, two down facingreversing racks also on the bed on the other side of the center track, acrank disposed in the plane of the reversing racks, reversing membersdriven from said crank, a shaft for driving said crank, reversingpinions fixedly mounted relative to said tracks and engaging thereversing members and the reversing racks, main and return stroke gearsunderneath the bed in the plane of the main and return stroke racks, anda second shaft for supporting and driving the said main and returnstroke gears.

16. A printing machine comprising: co operating printing members, one ofwhich has a reciprocating movement,sliding crossheads for reversing themovement of the printing member, crank means, and connections betweenthe crank means and the slid ing crossheads, said crank means,crossheads and connections being so constructed, timed and connected toeach other that each crosshead during the reversal of the reciprocatingprinting member is nearest to the center of rotation of the crank meanssubstantially at the moment of reversal of the printing member.

17. A printing machine comprising: cooperating printing members, one ofwhich has a reciprocating movement sliding crossheads for reversing themovement of the printing member, crank means, and connec tions betweensaid crank means and the s1iding crossheads, said crank means,crossheads and connections being so constructed, timed and connected toeach other that the crank means durin the reversal of the printingmember at each end of its stroke passes through that are of its movementon that side of its center of rotation which is op posite to the side onwhich the sliding-cross head which is effecting the reversal of thereciprocating printing member is located.

18. A printing machine comprising: cooperating printing members, one ofwhich has a reciprocating movement, a crank op eratively included in.the machine, two connecting rods extending from said crank and sorelated thereto that when the crank imparts its gaining effectivemovement to one connecting rod its lagging effective move ment isimparted to the other connecting rod and vice versa, and areciprocatingreversing member connected to each connecting rod constructed, timed andarranged to reverse the movement of the bed during a period when itsconnecting rod has imparted to it the lagging effective movement of thecrank. r

19. A counterbalanced reversing mechanism for printing machinescomprising: a reciprocating member, reversing racks carried thereby, areversing crank, reciprocating reversing members connected to saidcrank, and oscillating gears having a fixed center of rotationinterposed between the reversing members and the reversing racks.

20. A printing machine comprising: cooperating prii'ltiug members, oneof which has a reciprocating movement, crank means operatively includedin the machine, means for transmitting a portion of the thrust of thereciprocating member to the crank means in a direction opposed to thedirection of travel. of the recipr eating member during each reversal ofthe reciprocating member at each end of its stroke, said means includingdevices connecting the reciprocating print-- ing member and crank foreffecting the re versal of the movement of the former at each end of itsstroke at a lagging crank ratio.

2i. A printing machine comprising: cooperating printing members, one ofwhich has a reciprocating movement, crank means operatively included inthe machine, connecting means between the crank means and thereciprocating member for effecting the reversal of the movement of thelatter at each end of its stroke at a lagging crank ratio, saidconnecting means including devices for transmitting the thrust of thereciprocating member during the reversal at each end of its stroke tothe crank meansin a direction opposite that of the direction ofnnnen'n-z-nt of the reciprocating member.

22. A printing machine cmnprising: cooperating printing members, one ofwhich has a reciprocating movement, reciprocating reversing means forreversing the movement of the reciprocating printing member, crank meansfor driving said reversing means, connecting means between said crankand reversing means so constructed and timed with relation to the crankandreversing means that the. crank means during the reversal of theprinting member at each end of its stroke passes through that are of itsmovement on that side of its center of rotation which is opposite to theside on which the active reversing means is located, said connectingmeans including devices for transmitting the thrust of the reciprocatingmember during the reversal at each end of its stroke to the reversingcrank in a direction opposite to that of the direction of movement ofthe reciprocating member.

A printing machine comprising: cooperating printing members, one ofwhich has a reciprocating movement, reciprocating reversing means forreversing the movement of the reciprocating printing member, crank meansfor driving said reversing means, connecting means between said crankand reversing means SO COIlStIUCtGCi and timed with relation to thecrank and reversing means that the cran means during the versal of theprinting member at each end of its stroke passes through that are of itsmovement on that side of its center of rotation which is opposite to theside on which the active reversing means is located, means driven bysaid reversing means for transmitting the thrust of the reciprocatingmember during the reversal at each end of its stroke to the reversingcrank in a direction opposite to thatyof the direction of movement ofthe reciprocating member, and means for receiving the direct thrust ofthe bed during its reversal at each end of its stroke.

24. A. printing machine comprising: cooperating printing members, one ofwhich has a reciprocating movement, a crank op eratively included in themachine, two connecting rods extending from said crank. and so relatedthereto that when the crank imparts its gaining effective movement toone connecting rod its lagging effective movement is imparted to theother of said connecting'rods and vice versa, a reciprocating reversingmember connected to each 0011- necting rod arranged to reverse themovement of the bed during a period when its connecting rod has impartedto it the lag erating said reversing means the direction 7 V of movementof which 1s opposite that of the reciprocating member, whereby thethrust of the reciprocating member is transmitted to the framework inopposed directions durmg each reversal. of the reciprocating member ateach end of its stroke.

26 A printing machine comprising: an impression member, a reciprocatingbed, an odd number of tracks on which the bed reciprocates, two downfacing main racks on the bedon one side of the center track, two downfacing reversing racks also on the bed on the other side of the centertrack, an impression bridge located under the impression member andhaving an opening therein, main and return stroke gears underneath thebed in the planes of the main racks, reciprocating reversing membersmoving independently of said bed in. the planes of the reversing racks,one of said members passing through the opening in'the bridge connectingmeans between the reciprocating reversing membe s and the bed, and meanslocated on one side of the bridge and below the top thereof foractuating both reciprocating reversing members.

27. A printing machine comprising: an impression member, a reciprocatingbed, an odd number of tracks on which the bed reciprocates, two downfacing main racks on the bed on one side of the center track, two

down facing reversing racks also on the bed on the other side of thecenter track, an impression bridge located under the impression memberand having an opening therein, main and return stroke gears underneaththe bed in the planes of the main racks, reciprocating reversingmember's moving independently or said bed in the planes of the reiersingracks, one of said members pass ing through the opening in the bridge,connecting means between the reciprocating reversing members and thebed, a crank on one side of the bridge whose center of rotation is belowthe top thereof and arranged on the same side of the center track as thereciprocating reversing members, connecting rods between the crank andthe reciprocating reversing members, the distance of the crank from thebridge and the length of the connecting rod extending from said crank tothe reversing member passing through the bridge being such that theconnecting rod is at all times on the same side of the bridge as thecrank.

28. A printing machine comprising: an impression member, a reciprocatingbed, an odd number of tracks on which the bed reciprocates, two downfacing main racks on the bed on one side of the center track, two downfacing reversing racks also on the bed on the other side of the centertrack, an impression bridge located under the impression member andhaving an opening therein, main and return stroke gears underneath thebed in the planes of the main racks, reciprocating reversing membersmoving independently of said bed in the planes of the reversing racks,one of said members passing through the opening in the bridge,connecting means between the reciprocating reversing members and thebed, a crank on one side of the bridge whose center of rotation is belowthe top thereof and arranged on the same side of the center track as thereciprocating reversing members, connecting rodsbetween the crank andthe reciprocating reversing members, the distance of the crank from thebridge and the length of the connecting rod extending from said crank tothe reversing member passing through the bridge being such that theangular elevation of the connecting rod takes place on that side of thebridge on which the crank is located.

29. A printing machine comprisin an impression member, a reciprocatingbed, an odd number of tracks on which the bed reciprocates, two downfacing main racks on the bed on one side of the center track, two downfacing reversing racks also on the bed on the other side of the centertrack, an impression bridge located under the impression member andhaving an opening therein, main and return stroke gears underneath thebed in the planes of the main racks, reciprocating reversing membersmoving independently of said bed in the planes of the reversing racks,one of said members passing through the opening in the bridge,connecting means between the reciprocating reversing members and thebed, means located on one side of the bridge and below the top thereoffor actuating both reciprocating reversing members, and a bed drivingshaft for operating the main and return stroke gears locatedintermediate the bridge and the actuating means.

30. A printing machine comprising: an impression member, a reciprocatingbed, an odd number of tracks on which the bed reciprocates, two downfacing main racks on the bed on one side of the center track, two

mg means between the reciprocating reversing members and the bed, meanslocated on one side of the bridge and below the top thereof foractuating both reciprocating reversing members, a bed driving shaft foroperating the main and return stroke gears located intermediate thebridge and the actuating means, and means for driving the impressionmember and actuating means from said driving shaft.

31. A printing machine comprisin an impression member, a reciprocatingbed, an odd number of tracks on which the bed reciprocates, two downfacing main racks on the bed on one side of the center track, two downfacing reversing racks also on the bed on the other side of the centertrack, an impression bridge located under the impression member andhaving an opening therein, main and return stroke gears underneath thebed in the planes of the main racks, reciprocating reversing membersmoving independently of said bed in the planes, of the reversing racks,one of said members passing through the opening in the bridge,connecting means between the reciprocating reversing members and thebed, a crank on one side of the bridge Whose center of rotation is belowthe top thereof and arranged on s reiversin member assin throu h the b p7 b b bridge being such that theconnecting rod is at all times on thesame side of the bridge as the crank, and a bed driving shaft foroperating the main and return stroke gears located intermediate thebridge and the crank.

32. A printing machine comprising: an impression member, a reciprocatingbed, an odd number of tracks on which the bed reciprocates, two downfacing main racks on the bed on one side of the center track, two. downfacing reversing racks also on the bed on the other side of the centertrack, an impression bridge located under the impression member andhaving an opening therein, main and return stroke gears underneath thebed in the planes of the main racks, reciprocating reversing membersmoving independently of said bed in the planes of the reversing racks,one of said members passing through the opening in the bridge,connecting means between the reciprocating reversing members and thebed, a crank on one side of the bridge whose center of rotation is belowthe top thereof and arranged on the same side of the center track as thereciprocating reversing members, connecting rods between the crank andthe reciprocatingreversing members, the distance of the crank from thebridge and the length of the connecting rod extending from said crank tothe reversing member passing through the bridge being such that theconnecting rod is at all times on the same side of the bridge as thecrank, a bed driving shaft for operating the main and return strokegears located intermediate the bridgeand the crank, and means fordriving the impression member and the crank from the driving shaft.

33. A printing machine comprising: an impression member, a reciprocatingbed, an odd number of tracks on which the bed reciprocates, two downfacing main racks on the bed on one side of the center track, two downfacing reversing racks also on the bed on the other side of the centertrack, an impression bridge located under the impression member andhaving an opening therein, main and. return stroke gears underneath thebed in the planes of the main racks, reciprocating reversing membersmoving independently of said bed in the planes of the reversing racks,one of said members passing through the opening in the bridge,connecting means between the reciprocating reversing members and thebed, a crank on one side of the bridge whose center of rotation is belowthe top thereof and arranged on the same side of the center track as thereciprocating reversing members, connecting rods between the crank andthe reciprocating reversing members, the distance of the crank from thebridge and the length of the connecting rod extending from said crank tothe reversing member passing through the bridge being such that theconnecting rod is at all times on the same side of the bridge as thecrank, a bed driving shaft for operating the main and return strokegears located intermediate the bridge and the crank, a gear on the beddriving shaft making six revolutions to each impression, a gear on theimpression member making two revolutions to each impression and meshingwith the gear on the bed driving shaft, and a gear rotating with thecrank making three revolutions to each impression and also meshing withthe gear on the bed driving shaft.

34. A printing machine comprising: an impression member, a reciprocatingbed, a bed driving shaft and a bed reversing shaft both extending from apoint outside the bed to a point underneath the bed, a gear at the outerend of the bed driving shaft, a gear on the impression member and a gearby the reversing shaft for effecting the reversal of the bed at each endof its stroke.

35. A printing machine comprising: an impression member making tworevolutions to each impression, a reciprocating bed, a bed driving shaftand a bed reversing shaft,

the former making six revolutions and the latter three revolutions toeach impression, both extending from a point outside the bed to a pointunderneath the bed, a gear at the outer end of the bed driving shaft, agear on the impression member and a gear on the reversing shaft bothmeshing with the outer gear on the bed driving shaft, main and returnstroke racks on the bed, a gear on the inner endof the bed driving shaftmeshing with the main' stroke rack, a gear meshing with the innergear onthe bed driving shaft and adapted to engage with the return stroke rack,and means actuated by the reversing shaft for effecting the reversal ofthe bed at each end of its stroke.

36, A counterbalanced reversing mechanism for printing machinescomprising: a reciprocating member, means for effecting the mainreoiprocation'of said member, a controlling member independent of themeans for effecting the main reciprocation of the reciprocating memberfor effecting the reversal of said reciprocating member, and means vfortransmitting the thrust "ofthe reciprocating member during the reversalat each end of its stroke to the controlling member in a directionopposite to that of the direction of movement of the reciproeatingmember.

37. A counterbalanced reversing mechanism for printing machinescomprising: a reciprocating member, means for effecting the mainreciprocation of said member, a reversing crank opera'tively included insaid mechanism but independent of the means for effecting the mainreciprocation of the reciprocating member, and means for transmittingthe thrust of the reciprocating member during the reversal at each endof its stroke to the reversing crank in a direction opposite to that ofthe direction of movement of the reciprocating member.

38. A counterbalanced reversing mechanism for printing machinescomprising: a reciprocating member, means for effecting the mainreciprocation of said member, a reversing crank independent of the meansfor effecting the main reciprocation of the reciprocating membertraveling during the period of reversal of the reciprocatingmember in adirection opposite to that of the reciprocating member, and means fortransmitting the thrust of the reciprocating member during the reversalat each end of its stroke to the reversing crank in the same directionas the direction of movement of said crank.

39. A counterbalanced reversing mechanism for printing machinescomprising: a framework, a reciprocating member, means for effecting themain reciprocation of said member, and means independent of the meansfor effecting the main reciprocation of the reciprocating member andmovable in directions reverse to the direction of movement of thereciprocating member for transmitting the thrust of the reciprocatingmember to the framework in opposite directions during each reversal ofthe recipro eating member at each end of its stroke.

40. A counterbalanced reversing mechanism for printing machinescomprising: a reciprocating member, a reversing. crank for effecting thereversal of the reciprocating member, and means for transmitting thethrust of the reciprocating member during the reversal at each end ofits stroke to the reversing crank in a direction opposite to that of thedirection of movement of the reciprocating member.

41. A counterbalanced reversing mechanism for printing machinescomprising: a reciprocating member, a reversing crank traveling during.the period of reversal of the reciprocating member in a directionopposite to that of the reciprocating member, and means for transmittingthe thrust of the reciprocating member during the reversal at each endof its stroke to the reversing crank in the same direction as thedirection of movement of said crank. I

' 42. A counterbalanced reversing mechanism for printing machinescomprising: a framework, and means engaging the reciprocating member atthe ends of its path of travel for transmitting the thrust of thereciprocating memberto the framework in opposite directions during eachreversal of the reciprocating member at each end of its stroke. 7

431 A. counterbalanced reversing mechanism for printing machinescomprising: a reciprocating member, 'areversing crank operativelyincluded 7 in said mechanism, means for transmitting the thrust of thereciprocating member during the reversal at each end of its stroke tothe reversing crank in a direction opposite to that of the direction ofmovement of the reciprocating mem her, and means for receiving thedirect thrust of the bed during its reversal at each end of its stroke.V

44. A counterbalanced reversing mecha nism for printing machinescomprising: a reciprocating member, a reversing crank traveling duringthe period of reversal of ceiving the direct thrust of the bed during"its reversal at each end of its stroke.

45. A counterbalanced reversing mecha nism for printing machinescomprising: a reciprocating member, reversing racks car ried thereby, areversing crank, reciprocating reversing members connected to saidcrank, and oscillating gears having fixed centers of rotation interposedbetween the reversing members and the reversing racks, aid reversingcrank being located intermediate said gears.

46. A counterbalanced reversing mechanism for printing machinescomprising: a framework, a reciprocating member, means adjacent each endof the path of travel of the reciprocating member for reversing thedirection of travel of said member, and driving means for said reversingmeans mounted in the framework intermediate the reversing means, saidreversing means being adapted to transmit a portion of the thrust ofsaid reciprocating member through the a driving means to the frameworkin a direction opposed to the direction of travelrof said reciprocatingmember, whereby the thrust of the reciprocating member iscounterbalanced.

47. A counterbalanced reversing mechanism for printing machinescomprising: a framework, a reciprocating member, means for reversing thedirection of movement of the reciprocating member at one end of its pathof travel, means spaced from said firstnamed means for reversing thedirection of movement of the reciprocating member at the other end ofits path of travel, driving means for said reversing means mounted inthe framework intermediate said reversing means, and means connectingsaid driving means to each of said reversing means, said reversing meansbeing adapted to transmit a portion of the thrust to the reciprocatingmember through the connecting means and the driving means to theframework in a direction opposed to the direction of move ment of saidreciprocating member, where by the thrust of the reciprocating member iscounterbalanced.

48. A counterbalanced reversing mechanism for printing machinescomprising: a framework, a reciprocating member, a reversing rackmounted on the reciprocating member adjacent each end thereof, a pinionfixedly mounted in the framework and cooperating withone of said racksto reverse the reciprocating member at one end ofpits direction oftravel, another pinion spaced from the first-named pinion andcooperating with the other rack to reverse the recip rocating member atthe end of its direction of travel, and driving means for the pinionsmounted in the framework intermediate the pinions, said pinions beingadapted to transmit a portion of the thrust of the reciprocating memberthrough the driving means to the framework in a direction opposed to thedirection of movement of said reciprocating member, whereby the thrustof the reciprocating member is counterbalanced.

49. A counterbalanced bed reversing mechanism comprising: a framework, areciprocating bed, means for directing a portion of the thrust of thereciprocating bed in a direction counter to the direction of movement ofthe reciprocating bed during its reversal including: rotating reversingmeans, reciprocating reversing means and oscillating reversing means;and means for receiving the direct thrust of the reciprocating bedduring its reversal.

50. A counterbalanced bed reversing mech anism comprising: a framework,a reciprocating bed, means for directing a portion of the thrust of thereciprocating bed in a direction counter to the direction of move mentof the reciprocating bed during its reversal including: a rotatingcrank, reciprocating means connected with said crank and oscillatinggears engaging the reciprocating means and the reciprocating bed; andmeans for receiving the direct thrust of the bed during its reversal.

51. A counterbalanced bed reversing mechanism comprising: a framework, areciprocating bed, means for directing a portion of the thrust of thereciprocating bed ina direction counter to the direction of movement ofthe reciprocating bed during its reversal including: reciprocating meanshaving a greater number of reciprocations during each cycle of themachine than has the reciprocating 'bed, and means for so connectingsaid means and bed, during reversal of the bed, that they are travelingin opposite directions, and means for receiving the direct thrust of thebed during its reversal.

52. A counterbalanced bed reversing mechanism comprising: a framework, areciprocating bed, means for directing a portion of the thrust of thereciprocating bed in a direction counter to the direction of movement ofthe reciprocating bed during its reversal including: rotating means,reciprocating means connected with said rotating means, and having agreater number of re ciprocations during each cycle of the machine thanhas the reciprocating bed, and oscillating gears for so connecting saidreciprocating means and bed, during reversal of the bed, that they aretraveling in opposite directions, and means for receiving the directthrust of the bed during its reversal.

Signed at Plainfield, in the county of Union and State of New Jerseythis 26th day of September A. D. 1914.

DAVID JOHN SCOTT. CARL EBERHARD DRANGE.

Witnesses J. V. (Jones, J. "W. DICKINSON.

It is hereby certified that in Letters Patent No. 1,339,526, granted May11, 1920, upon the application of David John Scott and Carl EberhardDrange, of Plainfield, New J ersey, for an improvement inPrinting-Machines, an error appears in the printed specificationrequiring correction as follows: Page 8, claim 31, strike out lines108411, both inclusive, and insert the words rerersing members, thedistance of the crank from the bridge and the length of the connectingrod extending from said crank to the reversing member passing throughthe; and that the said Letters Patent should be read with thiscorrection therein that the same may conform to the record of the casein the Patent Ofiice.

Signed and sealed this 31st day of August, A. D., 1920.

M. H. coULsT oN, Acting Commissioner of Patents.

[SEAL]

